We're sure it was all very reserved

One Direction were straight out to celebrate winning their BRIT award for Best British Single last night, at one of the many after parties held in central London.

The boys rocked up to The Arts Club in Mayfair, and if these pics are anything to go by, soon found themselves surrounded by the ladies.

harry styles surrounded with girls at the brits after party 2012

It's not exactly a secret that Niall Horan thinks Alexandra Burke is fit, so he must have been having a whale of a time. Good on ya Nialler.

Bit awkward for Chloe Green though.

niall horan from one direction at brits 2012 after party with alexandra burke and chloe green

Click next for more pictures of the boys at the party!